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Derivative Financial Instruments - Gross Positions without Impact of Master Netting Agreements (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative assets $ 47 $ 25
Impact of master netting agreements, Assets 0 0
Derivative values with impact of master netting agreements (as carried on balance sheet), Assets $ 47 $ 25
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other assets Other assets
Cash collateral (held) pledged, Assets $ (46) $ (26)
Net position, Assets 1 (1)
Derivative liabilities (79) (244)
Impact of master netting agreements, Liabilities 0 0
Derivative values with impact of master netting agreements (as carried on balance sheet), Liabilities $ (79) $ (244)
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities Other liabilities
Cash collateral (held) pledged, Liabilities $ 39 $ 30
Net position, Liabilities $ (40) $ (214)